NRCA ProCertified Asphalt Shingle Installer Practice Questions - NRCA ProCertified Asphalt Shingle Installer Exam

What is the minimum thickness of OSB decking required by NRCA and IRC for steep-slope asphalt shingle applications?

7/16-inch span-rated OSB 3/8-inch OSB 1/2-inch OSB 5/8-inch OSB

Correct Answer:

7/16-inch span-rated OSB

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